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 (
    21615, 22401, 18902, 18933, 18937, 18940, 
    18943, 19015, 19227, 19254, 19288, 
    23189, 23209, 23269, 23270, 23320, 
    22756, 22768, 22770, 22785, 22797, 
    23002, 23005, 23319, 23326, 19242, 
    19253, 23208, 23264, 23268, 23300, 
    23301, 23302, 23329, 23330, 23331, 
    23332, 23333, 23334, 23335, 23336, 
    22763, 22786, 22801, 22867, 22868, 
    22870, 22871, 23000
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00254

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "176.41"
    },
    "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": 49,
            "rows_produced_per_join": 49,
            "filtered": "100.00",
            "index_condition": "(`danishecarter_latest`.`cscart_product_feature_variants`.`variant_id` in (21615,22401,18902,18933,18937,18940,18943,19015,19227,19254,19288,23189,23209,23269,23270,23320,22756,22768,22770,22785,22797,23002,23005,23319,23326,19242,19253,23208,23264,23268,23300,23301,23302,23329,23330,23331,23332,23333,23334,23335,23336,22763,22786,22801,22867,22868,22870,22871,23000))",
            "cost_info": {
              "read_cost": "107.81",
              "eval_cost": "9.80",
              "prefix_cost": "117.61",
              "data_read_per_join": "129K"
            },
            "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": 49,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "49.00",
              "eval_cost": "9.80",
              "prefix_cost": "176.41",
              "data_read_per_join": "148K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}