SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36fc8004f6057a3766cbb3f7f613d7bcc0bbedbf79011e8a0432ffaab99a745a' 
  AND token = 'MqA1Kn/YIAV2+DTqmYjZPHzG8xDW2y5+uHjBk0IA4mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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