SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '563f09b1da784b92b8d5e3fb90798036ab68a3125624a5141a4a4bb0b5e6af66' 
  AND token = 'o25aUHHkAaY2eij0VYNabUUMm8h/zk8gNDVl0V9wAoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

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