If Kairat Almaty wins against Celtic and advances to the Champions League, it would be the biggest surprise of recent years. As far as I remember, the last team I was surprised like this was Sheriff's. They also beat Real Madrid. Surprises like this are truly exciting in football. So, realistically, I think Kairat qualifying is only possible because the Scottish team has a much stronger team.
Regarding first leg match result, its advantage position for Kairat Almaty after playing draw first leg and today will face Celtic as home match at second leg have more motivate for getting victory because fully support from their fans. I don't know well with Kairat Almaty as Kazakhstan Premier League teams with current 3rd standings at domestic league but achievement until success qualifying last round of Champion League playoff become best achievement.
Kairat Almaty have started their journey at Champion League since first qualifying round until success qualify to playoff round, its amazing journey how unknow team success reach the playoff round and one step closer for participating at UEFA Champion League if can secure the winning games from Celtic and firstly Kazakhstan Premier League team who playing in UCL.