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, 7, 50, 54, 238, 162, 262, 265, 282, 281, 
    120, 122, 127, 149, 123, 125, 234, 147, 
    287, 22, 165, 263, 290, 126, 289, 146, 
    294, 26, 170, 121, 232, 300, 237, 8, 57, 
    303, 304, 110, 1305, 302, 1453, 11, 10, 
    9, 58, 311, 158, 98, 111, 160, 3, 43, 154, 
    155, 367, 148, 366, 1462, 1463, 1466, 
    1465, 1300, 1826, 1349, 1832, 1833, 
    1830, 267
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00125

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "71.41"
    },
    "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": 68,
            "rows_produced_per_join": 68,
            "filtered": "100.00",
            "index_condition": "(`test_uchur_k`.`cscart_product_feature_variants`.`variant_id` in (1,7,50,54,238,162,262,265,282,281,120,122,127,149,123,125,234,147,287,22,165,263,290,126,289,146,294,26,170,121,232,300,237,8,57,303,304,110,1305,302,1453,11,10,9,58,311,158,98,111,160,3,43,154,155,367,148,366,1462,1463,1466,1465,1300,1826,1349,1832,1833,1830,267))",
            "cost_info": {
              "read_cost": "40.81",
              "eval_cost": "6.80",
              "prefix_cost": "47.61",
              "data_read_per_join": "105K"
            },
            "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": 68,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "17.00",
              "eval_cost": "6.80",
              "prefix_cost": "71.41",
              "data_read_per_join": "211K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}