Menelkir: I'm on the same boat, i asked for a key 4 days ago and still nothing, checked my junk folder but nothing there.
There's a decent chance you'll get it early next week... it usually takes a few days and the team that sends them out doesn't work on weekends. I received mine yesterday and I think I requested it on Monday, or possibly over last weekend.
If you don't get it though, you can try submitting a second request, that has worked for several people.
Also, I had heard that the email account that sends out the keys was support-AT-gog.com, but mine actually game from hd-games-AT-gog.com. In case that helps anyone with it getting caught in their spam filter.