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 (
    64373, 64192, 64193, 64200, 64201, 64396, 
    64807, 64762, 64583, 64764, 64584, 
    64585, 64586, 64587, 64588, 64202, 
    64496, 64509, 64492, 64510, 64493, 
    64494, 64495, 64483, 64513, 64491, 
    64511, 64497, 64512, 64813, 64815, 
    64821, 64831, 64827, 64828, 64829, 
    64830, 64834, 64386, 64399, 64773, 
    64817, 64390, 64824, 64770, 64351, 
    64191, 64197
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00253

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "124.87"
    },
    "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": 48,
            "rows_produced_per_join": 48,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "57.67",
              "eval_cost": "9.60",
              "prefix_cost": "67.27",
              "data_read_per_join": "54K"
            },
            "used_columns": [
              "variant_id",
              "color",
              "position"
            ],
            "attached_condition": "(`webmarco`.`cscart_product_feature_variants`.`variant_id` in (64373,64192,64193,64200,64201,64396,64807,64762,64583,64764,64584,64585,64586,64587,64588,64202,64496,64509,64492,64510,64493,64494,64495,64483,64513,64491,64511,64497,64512,64813,64815,64821,64831,64827,64828,64829,64830,64834,64386,64399,64773,64817,64390,64824,64770,64351,64191,64197))"
          }
        },
        {
          "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": [
              "webmarco.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 48,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "48.00",
              "eval_cost": "9.60",
              "prefix_cost": "124.87",
              "data_read_per_join": "216K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}