SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00eafccb4de9ce5e97dd9a2493719633adcae358b18aa45a6e991b81bf9a74ae' 
  AND token = '1+okNxT1HMNB+0ngkvgtIqKzQVAhV0odE2c/ygql1rY=' 
  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