SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    21746, 3621, 475, 41130, 6066, 2250, 
    6660, 1306, 16847, 5590, 3753, 2298, 
    1305, 23481, 5583, 36568, 2498, 1051, 
    36474, 3224, 5478, 32706, 28438, 3767, 
    6070, 38647, 3755, 34551, 4785, 48847, 
    1439, 5726
  )

Query time 0.00147

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 32,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (21746,3621,475,41130,6066,2250,6660,1306,16847,5590,3753,2298,1305,23481,5583,36568,2498,1051,36474,3224,5478,32706,28438,3767,6070,38647,3755,34551,4785,48847,1439,5726)"
        }
      }
    ]
  }
}