I don't really like your play here.
UTG has 38.5xbb. They are also opening UTG which means they likely have a strong range. A3s is just not a great hand in that spot. You're out of position, with a dominated hand, a hand that plays best with high SPRs because it's a drawing hand not a high-pair hand, and you don't have the initiative. It is totally acceptable to just fold here. If the button had opened, maybe 3bet if they're aggressive, but otherwise don't waste money with this hand. I'm not playing this hand against short stacks unless I am planning on taking the pot away from them. It's harder to take the pot away from strong ranges.
The flop is as good as they come for you, with an SPR of 5, you could check-raise all-in on this flop with most villains. The stacks are a little weird but you have an over-card, a flush draw, and a backdoor straight. There's some
equity here. Plus, your shove will fold out a lot of his range. If he's fairly loose UTG and c-betting all of his range, you can fold as much as 70% of his range here and you'll get the 23c without needing to hit your hand. It can be pretty player dependent, but in a vacuum I prefer this to the line you took.
When he calls, with top-pair or better and his flush draws, you have about 45% equity. That's pretty close to what you need to risk 71c for the 85c out there (45.5% equity is required). You'll likely be a little behind when he calls, but the folds and the pot
odds should more than make up for it. In this exact hand, we end up with 46.26% equity on this flop when called.
Check/calling the whole way down is terrible. This wasn't a bad beat. At no point in the hand were you ahead. And, you didn't play it well.
Best play? Fold pre-flop. Given that you won't do that, raise flop. And since the stack sizes are awkward, you might as well check-jam flop. A pot-sized check-raise would be to 41c and leave 30c behind. You can never fold after that. If you raise this flop small like 23c, you have 48c left behind. That would mean you need 31% equity to call if he shoves. You pretty much always have enough equity to call it off if he 3-bet jams on you (even if he only shoves JJ you have 26% and people shove more often than that when this short). So, you might as well maximize your fold equity by jamming yourself.
Calling is almost always the WORST option. It only gives you one way to win, you need to hit the best hand.