Originally Posted by ISTFlyer

There is also a Caffé Nero outside on the way to the metro station, as well as another coffee store called Cups & Clouds.
If you want food, there is also a Burger King in the arrivals level.

So plenty to do and not worth paying a hotel at the YOTEL airside for those hours.
Be aware that all airport concessions are at least 2-3 times more expensive than downtown stores.