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, 1241, 1973, 1904, 1659, 1660, 2470, 
    2000, 2451, 1787, 1905, 1900, 2455, 
    1462, 2457, 1972, 1902, 2075, 1995, 
    2483, 2484, 2491, 2494, 2495, 1999, 
    1931, 1912, 2366, 2367, 1789, 1899, 
    1748, 1935, 1234, 1712, 1389, 2353, 
    1933, 2361, 2363, 1988, 2357, 1941, 
    2365, 2335, 2360, 2358, 1984, 2290, 
    1996, 2340, 1930, 2354, 1867, 1545, 
    2268, 1994, 2333
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00123

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "60.91"
    },
    "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": 58,
            "rows_produced_per_join": 58,
            "filtered": "100.00",
            "index_condition": "(`test2_gaseus`.`cscart_product_feature_variants`.`variant_id` in (1202,1241,1973,1904,1659,1660,2470,2000,2451,1787,1905,1900,2455,1462,2457,1972,1902,2075,1995,2483,2484,2491,2494,2495,1999,1931,1912,2366,2367,1789,1899,1748,1935,1234,1712,1389,2353,1933,2361,2363,1988,2357,1941,2365,2335,2360,2358,1984,2290,1996,2340,1930,2354,1867,1545,2268,1994,2333))",
            "cost_info": {
              "read_cost": "34.81",
              "eval_cost": "5.80",
              "prefix_cost": "40.61",
              "data_read_per_join": "66K"
            },
            "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": 58,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "14.50",
              "eval_cost": "5.80",
              "prefix_cost": "60.91",
              "data_read_per_join": "180K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}