Unless the alien race came from Mars or Venus, or sent spacecraft that traveled for thousands of years, almost impossible.
The odds of any intelligent life within a thousand light years distance are tiny, and that, of the 14.5 billion years estimated life of the universe, they existed within the same tiny time frame that we do, the odds become ridiculously small.
The alternative is that they are inorganic life forms that are extremely long lived. Or that they live in a parallel reality or alternative universe to ours.
or a reality of different size or dimension. That kind of thinking gets my mind spinning.