SELECT 
  cscart_product_feature_variants.variant_id, 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variants.color, 
  cscart_product_feature_variant_descriptions.variant 
FROM 
  cscart_product_feature_variants 
  LEFT JOIN cscart_product_feature_variant_descriptions ON cscart_product_feature_variants.variant_id = cscart_product_feature_variant_descriptions.variant_id 
  AND cscart_product_feature_variant_descriptions.lang_code = 'en' 
WHERE 
  cscart_product_feature_variants.variant_id IN (
    23789, 23802, 23805, 23864, 24073, 24078, 
    24079, 24088, 26294, 26318, 23791, 
    26274, 23804, 24074, 24082, 23803, 
    24086, 24087, 26296, 26307, 26265, 
    23790, 24062, 24080, 24077, 26297
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "93.61"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_feature_variants",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 26,
            "rows_produced_per_join": 26,
            "filtered": "100.00",
            "index_condition": "(`danishecarter_25_march`.`cscart_product_feature_variants`.`variant_id` in (23789,23802,23805,23864,24073,24078,24079,24088,26294,26318,23791,26274,23804,24074,24082,23803,24086,24087,26296,26307,26265,23790,24062,24080,24077,26297))",
            "cost_info": {
              "read_cost": "57.21",
              "eval_cost": "5.20",
              "prefix_cost": "62.41",
              "data_read_per_join": "68K"
            },
            "used_columns": [
              "variant_id",
              "color",
              "position"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_product_feature_variant_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "danishecarter_25_march.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 26,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "26.00",
              "eval_cost": "5.20",
              "prefix_cost": "93.61",
              "data_read_per_join": "78K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}