SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '076c60ef5803bd285a271384f4a510b02af3674145dc0b66424d9f0b365c20d2' 
  AND token = 'RqpWlEFMPdBOaTQN+iRmZ10653LN2ZB2QoKu8+QeEqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

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