SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '228f95f90b2c0cac68b9194179e0cff7d78d6a02fe30fb32675c95ff7d6253b2' 
  AND token = '/1dMJm9N3+bp8p3SuLe+SEbi7BRbjmr30T0zoDdM79M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

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