SELECT 
  * 
FROM 
  cscart_premoderation_products 
WHERE 
  `product_id` IN ('1006', '1039', '1040', '1038')

Query time 0.00031

JSON explain

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