SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32435c37e5323b15a570abc966a8b121fb3a6cce4980687a3262d05b1816fb41' 
  AND token = '0yosCqu93xrRON4eN9KQp92Xs4ftfuo+vwTbLZzcwoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables