Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ea104c2eed2acee98a32ccdc91c7ad7cf881dac1d8279e80d8e4ab5949c19b9' 
  AND token = 'FHxJRSns2q+xmGg/jziOBU6sU4xF0RkRjlf43oLEkrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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