SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b8e148d1458d32e499b05d7c3c6b8dee1f7e9e9f7b7775ed4da79c774fd739c' 
  AND token = 'cBxoLL9Lncd+epeEx8wi5J1c0k3ZmIuidXqz8QWZ+5s=' 
  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