Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '164a70a4bd817c926f72f7539365e01b259b478d44d6cd54125c91f16c76e323' 
  AND token = 'Att0pdEhk1LPSMSxohpCprl75O8tzQ/5j8z7LYR0Qbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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