If I play token, can I ready red Darius?

No, playing a token will not ready Darius, Trifarian.

According to the rules and established RiftJudge FAQs:

• Tokens are not cards: Rule 182.2 states that "Tokens are not cards." Because Darius's ability specifically triggers when you play your "second card," tokens do not count toward this condition (as confirmed in RiftJudge FAQ #8290).
• Definition of Playing Cards: Rule 182.1.a notes that while tokens follow similar steps to playing cards, they remain distinct game objects.

To trigger Darius's ability, you must play him as the second actual card (not token) of your turn.