Most probably the condition you have put ,make sense. In elderly cats usually do things like this. As they don't have that much energy as of young days so they spend their days like this.
My Cat Is Laying In Her Water Bowl, Is She Just Losing It And It's Time To Let Her Go?
It can also be a sign of diabetes. My cat is on insulin but still lays with his head on the bowl. The main question for you would be does your cat drink a lot of water?