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 (
    523, 50, 58, 206, 1706, 120, 127, 149, 
    438, 441, 146, 147, 279, 1708, 1709, 
    121, 122, 182, 430, 1711, 439, 1666, 
    1712, 1713, 170, 1735, 440, 1737, 1738, 
    1739, 1677, 1740, 1741, 1702, 1705, 
    59, 1746, 1673, 1680, 1682, 1688, 1748, 
    597, 1646, 1642, 1644, 1645, 165, 469, 
    1649, 280, 1652, 1653, 1658, 1661, 1665, 
    1349, 98, 1669, 1627, 1670, 1, 276, 246, 
    362, 1714, 1715, 1716, 429, 431, 447, 
    448, 433, 513, 446, 442, 1619, 1620, 
    1623, 1628, 1629, 1630, 1637, 1633, 
    1634, 1635, 460, 1804, 1805, 1663, 1662, 
    1664, 1667, 1668, 1638, 1640, 1656, 
    1671, 1672
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00183

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "103.96"
    },
    "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": 99,
            "rows_produced_per_join": 99,
            "filtered": "100.00",
            "index_condition": "(`test_uchur_k`.`cscart_product_feature_variants`.`variant_id` in (523,50,58,206,1706,120,127,149,438,441,146,147,279,1708,1709,121,122,182,430,1711,439,1666,1712,1713,170,1735,440,1737,1738,1739,1677,1740,1741,1702,1705,59,1746,1673,1680,1682,1688,1748,597,1646,1642,1644,1645,165,469,1649,280,1652,1653,1658,1661,1665,1349,98,1669,1627,1670,1,276,246,362,1714,1715,1716,429,431,447,448,433,513,446,442,1619,1620,1623,1628,1629,1630,1637,1633,1634,1635,460,1804,1805,1663,1662,1664,1667,1668,1638,1640,1656,1671,1672))",
            "cost_info": {
              "read_cost": "59.41",
              "eval_cost": "9.90",
              "prefix_cost": "69.31",
              "data_read_per_join": "153K"
            },
            "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": 99,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "24.75",
              "eval_cost": "9.90",
              "prefix_cost": "103.96",
              "data_read_per_join": "308K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}