So I mixed 25 mL of 0.002 M KSCN and 25 mL of water in a beaker. The solution was clear with no precipitants.

But then it says the ions present in KSCN are:

so i put K+,S2- , CN-

is that right?

No. The ions present are K^+ and SCN^-. SCN^- is a polyatomic ion, just like SO4^-2, ClO3^-, PO4^-3 etc.