Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b9412d5325bf08fb53dbfa337fc3e2a4201e2b9ec2614395b317723deedfef5' 
  AND token = 'dVAbadQVRLqm2Tto1qKKuNoL0V2Vg3+XboBSQcAutog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}