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

Query time 0.00067

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.06"
    },
    "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": 41,
            "rows_produced_per_join": 41,
            "filtered": "100.00",
            "index_condition": "(`gaseus`.`cscart_product_feature_variants`.`variant_id` in (1202,1912,1904,1659,1660,2361,1905,2363,1988,1712,2357,1973,1941,1899,1900,1787,1789,1995,2365,2335,2360,1972,2075,2358,2000,1984,2290,1996,2340,1930,1902,1389,2354,1867,1748,1545,2268,2382,1256,1994,2333))",
            "cost_info": {
              "read_cost": "24.61",
              "eval_cost": "4.10",
              "prefix_cost": "28.71",
              "data_read_per_join": "46K"
            },
            "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": 41,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "10.25",
              "eval_cost": "4.10",
              "prefix_cost": "43.06",
              "data_read_per_join": "127K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}