SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08b928429c75cbdbdd92e4705b17630e23f3165126693396ff5ae6289991361c' 
  AND token = 'T7EUt7TAlSCCJpFQ1c4qEfuOzcb2j3amRZENv/AtZDM=' 
  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