SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    157878, 163555, 142795, 152834, 140470, 
    161677, 150431, 122494, 174303, 152788, 
    159979, 152387
  )

Query time 0.00031

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 (157878,163555,142795,152834,140470,161677,150431,122494,174303,152788,159979,152387)"
        }
      }
    ]
  }
}