SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd70a9c77273b0aaecdb1d182b0bab9f595286532d2f20775a6353d01db868fb5' 
  AND token = '0+RPFcWOpHWlTRfBX0KYAyQe1vwADPnuQmva5EL3RMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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