I would have raised more than 2 times the BB preflop with AKo heads up
Actually he raised 3x the BB (BB= 40,000, he bet 120,000).
With the blinds this high your opponent is most likely going to call with a hand like 89, which is VERY playable heads-up.
His push on the flop makes it look like he is trying to steal the pot - which is what he wants you to think... He probably has put you on two overcards here or an Ace and is trying to induce a call with what looks like a steal-raise.
I would personally have to be in the heads-up situation to know how a guy is really playing, but here I fold the AK... there are WAY too many hands that are ahead of you here (any pair as well as an open-ended draw with two live cards, etc.)
Fold the AK and move on to play another hand.