And the passage from Matthew 24 is unrelated to the thousand years or who enters into it.
Are you really speaking of "Matthew 24" here? (or was that a typo perhaps?)
Either way (and for the readers), yes, Matthew 24 ALSO covers that same Subject.
Example: Matthew 24:43-51 is parallel to Luke 12:36-37,38,40,42-44,45-48... about that very thing ("when he will RETURN FROM the wedding"... THEN the meal [G347; <--and this word used elsewhere to speak of the earthly MK age, too]).
Matt24:33's "IT" is speaking of that very thing related to this: His Second Coming to the earth, and who will ENTER the earthly MK age which commences following this point.
If you were referring to Matt25:31-46, instead, well that's been discussed... so I won't address that in this post.