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 (
    23321, 18882, 18902, 18937, 18940, 18943, 
    22756, 22763, 22768, 22778, 22785, 
    22797, 23005, 23035, 23040, 23341, 
    21702, 19227, 23189, 22755, 22766, 
    23349, 22724, 22779, 23350, 23034, 
    23046, 21574, 18860, 22773, 23367, 
    21725, 18903, 19242, 23006, 23043, 
    21710, 23375, 21717, 22781, 23042, 
    23377, 23208, 18866, 22775, 23407
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00106

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "165.61"
    },
    "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": 46,
            "rows_produced_per_join": 46,
            "filtered": "100.00",
            "index_condition": "(`danishecarter_latest`.`cscart_product_feature_variants`.`variant_id` in (23321,18882,18902,18937,18940,18943,22756,22763,22768,22778,22785,22797,23005,23035,23040,23341,21702,19227,23189,22755,22766,23349,22724,22779,23350,23034,23046,21574,18860,22773,23367,21725,18903,19242,23006,23043,21710,23375,21717,22781,23042,23377,23208,18866,22775,23407))",
            "cost_info": {
              "read_cost": "101.21",
              "eval_cost": "9.20",
              "prefix_cost": "110.41",
              "data_read_per_join": "121K"
            },
            "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_latest.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 46,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "46.00",
              "eval_cost": "9.20",
              "prefix_cost": "165.61",
              "data_read_per_join": "139K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}