SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    3756, 31960, 47895, 5811, 3641, 3639, 
    2295, 5810, 3753, 2298, 49018, 3767, 
    3755, 3768, 6362, 4595, 5826, 2083, 
    636, 26319, 4597, 3640, 2297, 2300, 
    3757, 3746, 41396, 5812, 4600, 3752, 
    4621, 2080
  )

Query time 0.00205

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 (3756,31960,47895,5811,3641,3639,2295,5810,3753,2298,49018,3767,3755,3768,6362,4595,5826,2083,636,26319,4597,3640,2297,2300,3757,3746,41396,5812,4600,3752,4621,2080)"
        }
      }
    ]
  }
}