SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    295, 297, 289, 293, 288, 291, 292, 296, 
    290, 294, 285, 286
  )

Query time 0.00072

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 12,
      "filtered": 100,
      "attached_condition": "(cscart_products.product_id in (295,297,289,293,288,291,292,296,290,294,285,286))"
    }
  }
}