Perhaps, the time-out you think you need is not just about working. If you can't do a timeout from work, have you considered other things that may be going on in your life that could be adding to your boredom? Are you taking care other people? Are you in financial distress? Do you have time to do things that make you feel renewed or happy? Perhaps keeping a journal will help you sort out what's going on. A journal is helpful because over the course of a week or a month, you forget exactly what you were thinking or feeling at a particular moment. A journal will help you remember. Also, if you decide to see a career coach, journal notes will help you have a productive conversation with her or him during your sessions.
If you are so good at what you do, maybe it's time for you to learn some completely new skills. Do you speak or write a foreign language? Would being able to do so give you something challenging to hold onto in your current job?
Can you teach or become an instructor in some area of your work? Employers love when an employee steps up to become a leader in some area of work. You might discover some hidden talents within yourself.