we could do with two timers!

One for draw, 
One for time left to buy tickets; 

Often users get sad that they thought they still had 10 minutes to go and are waiting on that confirmation, to find they can't, or whatever else

be nice to make it crystal clear :D 

That was the initial implementation, but afterwards we decided to make it simpler. Two timers may confuse IMO

i think it would be very simply understood

Time left too buy tickets: 00:19:17

Lottery draw: 00:29:17

but it's a common thing to come up that people say they're trying to buy in that 10 minutes and asking where the buy tickets button has gone, so maybe after the 10 minutes you fill in with 

''No more tickets can be sold 10 minutes prior to draw'' 

1 timer, that clocks 2 times....

First timer, buy tickets within 23:50, when expired at 0 the time, text and font color changes to draw in 00:10 you're too late to purchase any more tickets.

Or something similair.

Let's ask for more opinions on this one!