A key holder that has a little shelf on it (idea from this thing).
This key holder has 6 hooks that are bent in a way that hangs the keys away from the wall, making them easy to grab on the go.
The crook of the hooks is located a distance away from the wall, which makes the keys hang away from the wall. This makes them easier to take off the wall than if they were resting up close to the wall.
I included the step file so that you may make modifications as needed.
UPDATE 8/20/2019: Added more STLs for various purposes, such as section dividers, desired number of screw holes, option for longer width (makes the keys less likely to bunch up - easier to grab), and increased structural support on the tray. The original is now called "Original_Short_Key_Tray.stl", the newer versions are prefixed with either "Short" or "Wide".
Print with higher infill on the key hooks and the tray to give it decent strength. I did not print with supports, but you may want to add supports on the tips of the key hooks depending on your printer.