SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    48692, 48683, 48677, 48684, 48680, 48695, 
    48676, 48715, 48678, 48679, 48685, 
    48735, 48687, 48716, 48686, 48691, 
    48689, 48690
  )

Query time 0.00206

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": 18,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (48692,48683,48677,48684,48680,48695,48676,48715,48678,48679,48685,48735,48687,48716,48686,48691,48689,48690)"
        }
      }
    ]
  }
}