Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55a3ab1af50fa1e124be8b1d8e97705b4125d5911b6b1f549a70c616fb451cff' 
  AND token = 'wQ7NPnArJxVHxmiC9in1Iq3C7MoEsssKuOxVJzznfsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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