Solution

A quay will not be easily found here, in the Odenwald. But loads and loads of keys of all sorts. Some more boring than the other. So I had to look further and play with the word. Hence this blip.

What looks like two (regular) keys, somehow a bit knotted, is in reality a puzzle. And the key [:)] to the solution is turning and sliding. Then you will manage to get them apart.

Thanks to chantler63 for hosting the challenge.