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 (
    1660, 1900, 1234, 1202, 1933, 1973, 1904, 
    1659, 1899, 1912, 2335, 1789, 1999, 
    2366, 1941, 1787, 2290, 1905, 1241, 
    2340, 1988, 2367, 2363, 1930, 2361, 
    1748, 1995, 2075, 1712, 1902, 2000, 
    1389, 2357, 1994, 2354, 1972, 2382, 
    1984, 2197, 2268, 1935, 1931, 1996, 
    1867, 2353, 1545, 2360, 1256, 2333, 
    2358, 2365
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00118

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "53.56"
    },
    "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": 51,
            "rows_produced_per_join": 51,
            "filtered": "100.00",
            "index_condition": "(`gaseus`.`cscart_product_feature_variants`.`variant_id` in (1660,1900,1234,1202,1933,1973,1904,1659,1899,1912,2335,1789,1999,2366,1941,1787,2290,1905,1241,2340,1988,2367,2363,1930,2361,1748,1995,2075,1712,1902,2000,1389,2357,1994,2354,1972,2382,1984,2197,2268,1935,1931,1996,1867,2353,1545,2360,1256,2333,2358,2365))",
            "cost_info": {
              "read_cost": "30.61",
              "eval_cost": "5.10",
              "prefix_cost": "35.71",
              "data_read_per_join": "58K"
            },
            "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": [
              "gaseus.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 51,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "12.75",
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              "prefix_cost": "53.56",
              "data_read_per_join": "158K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}