Can you cast a racial spell if you do not have access to the spell slot required?

For example a Drow has the racial spell Darkness, spell level 2 (gained at player level 5). Can he cast the spell even if he is multiclassed (Eldritch Knight 3; Cleric 2) and only has spell slots up to level 1? The spell requires spell slot 2 and that the player be level 5 total, so if he wants to cast it does he have to wait until he has a 2nd level spell slot?