Yes, when the sun is over the yardarm, then go for it.
Actually a martini has no sugar, well, not enough to be sticky, so that will not be a problem. The ethanol should evaporate very well.
So drying the keyboard should work.
My brother spilled a cup of tea with sugar and milk on it on his keyboard and put it thru the dishwasher and its fine!
And when I was a child, I spilled a glass of ginger ale on our lovely piano keyboard, and my father who never got mad at me and my brothers(not very often), used the opportunity to show me how to take an antique piano entirely apart and clean it.
I never forgot that lesson, as I loved it, and to this day, I can tune a piano and have the tools to do it, just given them to our daughter who took a class in tuning from an old man who had incredible knowledge of old pianos. The class included repair too.
I dont allow any drinks or food in my computer room at all, and we dont allow any smoking at all inside. Our wood stove is the only critter allowed to emit any smoke inside our house. Gin and Tonics anywhere else, or whatever our guests want to drink, but not in here.
Jane