It’s a common question and the correct answer isn’t “Your boss” or “Retired drinking mimosas on the beach in Mexico”.
The reason that this is such a common question is that employers want to make sure that you’re invested in the future of the company and that you’re intending on sticking around.
The best answer to this question shouldn’t be a generic answer that equates to brown nosing, but rather an imaginative response that outlines how you would like to be regarded as a professional and a team player.