SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca167b6f404ed7b222d12ec32114e58123e2a628defb7e122b3c1f5c9b6c0e0b' 
  AND token = 'jasVeKJtZn2S9I4dqtjzPU6J7A+v17BryIOVRykAXEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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