And, additonally, I don't believe Apple would send an email with a link that expires in 3 hours - or, at least, I've not heard of that.
No, the link to reset the password or security questions does expire after three hours, so that part is OK.
I reset my security questions a few days ago (I needed them to set-up two-step verification and I had forgotten what they were) and the mail I received looked pretty much as the OP's.
So the OP"s mail looks real, if you are still getting these often it could be someone is trying to get into your account. Make sure your password is secure.
regards