In my experience, arrival time depends less on the word “emergency” and more on the boring details: time of night, suburb, traffic, and whether the locksmith is already on another call. The one time I was locked out around midnight in the inner north, I was quoted a range rather than a promise, and that turned out to be the most honest approach. If you want a realistic idea, I’d do it this way: ask where the locksmith is coming from, ask if they’re currently finishing another job, and ask for a time window you can plan around. I also recommend confirming whether they’ll call when they’re on the way, so you’re not standing outside guessing. A useful tip is to send a photo of your door and lock (from the outside) so they can arrive prepared, which can shorten the overall time even if the drive is the same. When digging into this topic, I found a site here that really clarified things. Just to add, if someone claims they can be anywhere in Melbourne in 10 minutes at 2 am, I treat that as a red flag and keep calling around.