Having just flown around the same time of day/week couple week back, security was a non-issue, but the queues for immigration were very long and basically up to the point where the queue started in between the 2 security checkpoints, that's not an unusual view
I have no clue how long it would have taken as I have Privium but I suspect easily 30-40 minutes, add another possible 15-20 for security if your bag goes to secondary check.

1.5hrs should still be fine as long as you are ok with going directly to your gate after passing immigration (i.e. no lounge/shopping) but personally if I didn't have Privium I would go for 2hrs.