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 = 'ru' 
WHERE 
  cscart_product_feature_variants.variant_id IN (
    1, 59, 165, 429, 120, 121, 122, 362, 431, 
    147, 430, 447, 149, 146, 448, 433, 513, 
    127, 246, 438, 439, 440, 441, 446, 442, 
    597, 98, 1619, 1620, 170, 1623, 280, 
    1627, 1628, 1629, 1630, 1637, 1633, 
    1634, 1635, 460, 1804, 1805, 1663, 1661, 
    1662, 1349, 1664, 1667, 1668
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00095

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "52.51"
    },
    "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": 50,
            "rows_produced_per_join": 50,
            "filtered": "100.00",
            "index_condition": "(`test_uchur_k`.`cscart_product_feature_variants`.`variant_id` in (1,59,165,429,120,121,122,362,431,147,430,447,149,146,448,433,513,127,246,438,439,440,441,446,442,597,98,1619,1620,170,1623,280,1627,1628,1629,1630,1637,1633,1634,1635,460,1804,1805,1663,1661,1662,1349,1664,1667,1668))",
            "cost_info": {
              "read_cost": "30.01",
              "eval_cost": "5.00",
              "prefix_cost": "35.01",
              "data_read_per_join": "77K"
            },
            "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": [
              "test_uchur_k.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 50,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "12.50",
              "eval_cost": "5.00",
              "prefix_cost": "52.51",
              "data_read_per_join": "155K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}