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SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    1501, 1487, 1498, 1497, 1496, 1491, 1495, 
    1493, 1486, 1489, 1488, 1485, 1459, 
    1477, 1484, 1483, 1482, 1480, 1481, 
    1474, 1479, 1478, 1465, 1475, 1476, 
    1473, 1276, 1463, 1471, 1462, 1267, 
    1460, 820, 1472, 1464, 1470, 1469, 1468, 
    1467, 1466, 1461, 1458, 1457, 1456, 
    1455, 1454, 1446, 1450
  )

Query time 0.00057

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}