Sorry, but your inability to interact with your co-workers makes you a difficult person to employ. A ton of folks don't need this kind of special treatment.
It's more like your boss would rather have someone who doesn't need your special treatment, but since they have you, they've got to invent ways to deal with your special blend of crazy (office hours).
Further, you have no clue what my policy is regarding instant messaging, don't lash out at me because you're feeling vulnerable.
If they expected a response within an hour and didn't get it, they can call me or physically come to me.
I've told two of my bosses while being interviewed: Assume I'll check email only 3 times a day. Is that workable?
No one says "No" (even though it may not be workable).
One of my bosses actually suggested to me that I should have "office hours" and be available in those hours, and simply not respond all other hours.
It all depends on the need of the job. And most engineering/SW jobs do not need you to "be available to respond within an hour" for any request.