It passed by unanimous voice vote. That is, the president of the Senate (pro tempore, usually Patty Murray) asked for all in favor, and at least one person said “yea” and when asked for all opposed, nobody said “nay”. There wasn’t a roll call vote, so we don’t know how many people (or who) actually voted for it.
Edit: it was probably on C-Span, so you can probably find a recording and get an idea of how many people were there, and how many yeas you hear, if you’re so inclined.