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 (
    1731, 4847, 1560, 1592, 1563, 2137, 1539, 
    2276, 2175, 1564, 1544, 2854, 2077, 
    4047, 2273, 2281, 1526, 1562, 2250, 
    2251, 2288, 4816, 1733, 4809, 4807, 
    1729, 1559, 4957, 1684, 4414, 4418, 
    4819, 1543, 4821, 2117, 1542, 5378, 
    4027, 1541, 2116, 4071, 3038, 1565, 
    3037, 4084, 4091, 2136, 4102, 4109, 
    4140, 4153, 5911, 4250, 4274, 4311, 
    4318, 4354, 1540, 4242, 4393
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00146

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "63.01"
    },
    "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": 60,
            "rows_produced_per_join": 60,
            "filtered": "100.00",
            "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_feature_variants`.`variant_id` in (1731,4847,1560,1592,1563,2137,1539,2276,2175,1564,1544,2854,2077,4047,2273,2281,1526,1562,2250,2251,2288,4816,1733,4809,4807,1729,1559,4957,1684,4414,4418,4819,1543,4821,2117,1542,5378,4027,1541,2116,4071,3038,1565,3037,4084,4091,2136,4102,4109,4140,4153,5911,4250,4274,4311,4318,4354,1540,4242,4393))",
            "cost_info": {
              "read_cost": "36.01",
              "eval_cost": "6.00",
              "prefix_cost": "42.01",
              "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": [
              "softwarepirmam_hewadelivard_cscart_4.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 60,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "15.00",
              "eval_cost": "6.00",
              "prefix_cost": "63.01",
              "data_read_per_join": "181K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}