Sometimes a new quest starts with "I have to do that NOW" or "...immediately" or "...as soon as possible".
Are there any quests in Witcher 3 with a time limit?
Can I solve some quests only if I start it really "now" or "immediately" or within a specific time?
(I don't ask for quests who starts at "midnight" or another specific time, it's about the available time until a quest fails)

Summon Roach and ride hard to catch up, then go for a sword swipe when he's close enough." I just looted his cart...
– PeterCo Jun 23 '15 at 18:06