SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc5e0a0c0592fb73e7421e220208d21bd9f405ea86213fbdb04d3e9afff4cff' 
  AND token = 'HWzngQBsvETmc8Mef1mrObPWj0xcHhFxdpEjGxRPuAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

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