Answer:
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
What is it that no man ever yet did see, which never was, but always is to be?
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
What asks but never answers?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?