SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    459789, 423808, 427649, 419444, 411857, 
    415217, 426276, 419316, 424098, 448826, 
    436126, 407105
  )

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0216566,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 12,
          "cost": 0.0216566,
          "filtered": 100,
          "attached_condition": "cscart_products.product_id in (459789,423808,427649,419444,411857,415217,426276,419316,424098,448826,436126,407105)"
        }
      }
    ]
  }
}