SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e671da558e193605ed4cc0ae2aa8da96223bb46b3ca5c008727916251d8f18' 
  AND token = '2DiTfc+T38oB5LoT9unx2Tyh3eOdS6gileUnBEcIhdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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