No. You should be worried about wasting your beer.
The inside of a keyboard is normally a cheap membrane layer - basically, two sheets of plastic printed with conductive ink - that is surprisingly difficult to contaminate. As an added line of defence, there is usually a rubber thingy completely covering the top of the membrane (its purpose is to give the keyboard the right 'feel', but it doubles as a beer protector).
If it's fine now, it'll most likely be fine for a good while longer. Don't attempt to open it and clean it because you'll never get it back together again, and you'll waste more than $200NT worth of your time (ie., the price of a new one).