Your answer depends on the care you have given them to this point.
IF they are always maintained at proper pressure.
IF you kept them covered when not in use.
IF you did not exceed the maximum speed for the tire for prolonged periods.
IF you never pinched them on curbs.
IF they did not see many big pot holes.
If you do not mind being delayed and overcharged because you need a tire on Sunday afternoon in the middle of nowhere and you do not care what tires they will put on your fiver cause "that is all they have in stock" then you should be fine, but if any of the conditions above are not met then change the tires out