SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41aad81040e0dbf49eb8b2bfdf0eae354fe81a6a45ff85957c24fa2a49ae9111' 
  AND token = '8dilq3hYldOmVmmTFuj0gyLaM6RntqmaZHI/UmR/c9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

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