SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e17a44ab483bb2fd9508091238262b0426217e63ae5103689dfc3309eb4236a' 
  AND token = 'HMf/OJJFBMoc0eGhELmHJ56D1vuAC+C8GZ/O6oXa1XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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