SELECT 
  products.company_id as variant_id, 
  company_descr.i18n_company as variant 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_company_descriptions as company_descr ON company_descr.company_id = products.company_id 
  AND company_descr.lang_code = 'de' 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
WHERE 
  1 = 1 
  AND cscart_categories.category_id IN (174, 190, 191, 194, 193, 195) 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND products.product_type != 'D' 
GROUP BY 
  products.company_id 
ORDER BY 
  company_descr.i18n_company ASC

Query time 0.00082

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "16.64"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 6,
              "rows_produced_per_join": 0,
              "filtered": "4.00",
              "index_condition": "(`danishecarter_latest`.`cscart_categories`.`category_id` in (174,190,191,194,193,195))",
              "cost_info": {
                "read_cost": "14.36",
                "eval_cost": "0.05",
                "prefix_cost": "14.41",
                "data_read_per_join": "825"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`danishecarter_latest`.`cscart_categories`.`usergroup_ids` = '') or find_in_set(0,`danishecarter_latest`.`cscart_categories`.`usergroup_ids`) or find_in_set(1,`danishecarter_latest`.`cscart_categories`.`usergroup_ids`)) and (`danishecarter_latest`.`cscart_categories`.`status` in ('A','H')) and (`danishecarter_latest`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "danishecarter_latest.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 3,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.26",
                "eval_cost": "0.14",
                "prefix_cost": "14.81",
                "data_read_per_join": "11"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "danishecarter_latest.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "89.50",
              "cost_info": {
                "read_cost": "0.72",
                "eval_cost": "0.13",
                "prefix_cost": "15.67",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "usergroup_ids"
              ],
              "attached_condition": "(((`danishecarter_latest`.`products`.`usergroup_ids` = '') or find_in_set(0,`danishecarter_latest`.`products`.`usergroup_ids`) or find_in_set(1,`danishecarter_latest`.`products`.`usergroup_ids`)) and (`danishecarter_latest`.`products`.`status` = 'A') and (`danishecarter_latest`.`products`.`product_type` <> 'D'))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "danishecarter_latest.products.company_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "25.00",
              "cost_info": {
                "read_cost": "0.64",
                "eval_cost": "0.03",
                "prefix_cost": "16.45",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "company_id",
                "status"
              ],
              "attached_condition": "(`danishecarter_latest`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "company_descr",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id",
                "lang_code"
              ],
              "key_length": "10",
              "ref": [
                "danishecarter_latest.products.company_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.16",
                "eval_cost": "0.03",
                "prefix_cost": "16.64",
                "data_read_per_join": "283"
              },
              "used_columns": [
                "company_id",
                "lang_code",
                "i18n_company"
              ]
            }
          }
        ]
      }
    }
  }
}