SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e95a7bc829a7ff4af59d96f93bd86c2644275f5b99ce2c36d78354e95fed34d6' 
  AND token = 'ksrB+sJGSAR/vpYYnAXYc5JKvsr+9nIMFu0kwl30gbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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