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 (
    1202, 1235, 1973, 1904, 1659, 1660, 2540, 
    1905, 1789, 2499, 1787, 1900, 1899, 
    2542, 2543, 2544, 2545, 2546, 2547, 
    2548, 2550, 2551, 2552, 2553, 2554, 
    2555, 1389, 2355, 2496, 2500, 2000, 
    2502, 2505, 2506, 2507, 2509, 2451, 
    2510, 2512, 2514, 2516, 2520, 2523, 
    2525, 2526, 2527, 2528, 2529, 2530, 
    2531, 2532, 2533, 2534, 2535, 1254, 
    2566, 2567, 1836, 1245, 1881, 1933, 
    1988
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00097

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "65.11"
    },
    "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": 62,
            "rows_produced_per_join": 62,
            "filtered": "100.00",
            "index_condition": "(`test2_gaseus`.`cscart_product_feature_variants`.`variant_id` in (1202,1235,1973,1904,1659,1660,2540,1905,1789,2499,1787,1900,1899,2542,2543,2544,2545,2546,2547,2548,2550,2551,2552,2553,2554,2555,1389,2355,2496,2500,2000,2502,2505,2506,2507,2509,2451,2510,2512,2514,2516,2520,2523,2525,2526,2527,2528,2529,2530,2531,2532,2533,2534,2535,1254,2566,2567,1836,1245,1881,1933,1988))",
            "cost_info": {
              "read_cost": "37.21",
              "eval_cost": "6.20",
              "prefix_cost": "43.41",
              "data_read_per_join": "70K"
            },
            "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": [
              "test2_gaseus.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 62,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "15.50",
              "eval_cost": "6.20",
              "prefix_cost": "65.11",
              "data_read_per_join": "193K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}