SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    64859, 65675, 65677, 65676, 65662, 65655, 
    65799, 65797, 65656, 65658, 65812, 
    65821, 65802, 65810, 65819, 65809, 
    65822, 65820, 65811, 65806, 65800, 
    65801, 65818, 65807
  )

Query time 0.00084

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 24,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (64859,65675,65677,65676,65662,65655,65799,65797,65656,65658,65812,65821,65802,65810,65819,65809,65822,65820,65811,65806,65800,65801,65818,65807)"
    }
  }
}

Result