Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aeb62e9eb3d2d2e97113d18fb50098d14c7fdf8db56bbcd75c73f0b87e654db' 
  AND token = 'iyDkcTqgQDMi9YenhQp1hGJrcHmqA+SmpDCQoPPyia4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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