SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70103bc327f0866477610b24e157ae9f6037175cef8ef55f50483d8ec77c890b' 
  AND token = 'JYSXfZyEjnHE79ToVyfWyoYzX6gT73/47vfN0/2WFMY=' 
  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