In Stephen Hawking's new book, "The Universe in a Nutshell", he specifically mentions the paradox of an eternal God creating a temporal world. Why did God take so long, etc.? He says that the paradox only exists because of the way Newtonian time is conceived - as a straight line with no end points. Getting rid of the boundary conditions gets rid of the paradox.

Just as you can't go any farther south than the south pole, so you can't go any farther back in time than the beginning of time. But at the south pole there isn't a spot where the laws of physics no longer hold.

Putting aside the mathematical equations, Hawking's suggestion here is not so far away from Psalm 90's assumption that real time as we know it simply does not apply to God, who has no beginning or end. God does not have to condescend to being "in" time.