It is fine. I usually use Austin Homebrew (which I love) and it takes about 5-7 days for the order to arrive to me up in NY. The ice packs are long since melted by that time, so it has a few days at least without any "cooling". For that reason, I hardly ever include ice packs anymore with my online orders. Since I stopped including ice packs over a year ago, I've never had a non-usable Wyeast or White Labs yeast order. Definitely make a starter, as you should with almost all your liquid yeast batches, but I wouldn't worry about your current situation.