Donating for Lordaeron queue skipping - do I need a fresh donation?

Sorry if the question has been asked before...

I know that I have to spend min 5 coins on Lord's market, but do I also need to have donated recently?
I have 10 coins earned through the marketplace after the moltdown (I have donated BEFORE the moltdown); can I just use those?

You have 30 days of queue skipping on Lordaeron, starting from the day you buy an item. It doesn't matter where you got the coins from.