I have my 1994 and now my ignition key won't lock, the park light stays on (the little dot) I can take keys out lock car everything turns of except the dot, but anyone can get in and start car without keys and is this going to drain my battery

with this little light on. I tried to find a fuse, I know how to check all fluids, I'm single, but don't know how much or what is wrong to this. Someone please help me.