SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'febcab4eb69445e7b0dbaa125371784edbe5436b90fcaea5cb7c921105f1c36c' 
  AND token = 'GOKo1l2N8nEs6hh+B8f5/srWHKJGyln6q8vcnLh7D38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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