Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e3ed4b8e1bc768895a901dac49a59e79323399001cfa969d7fea0e9d55bd8ff' 
  AND token = '0Jp8MEnJmYVShoki07NHp22Qtvp/JXpGG9crdj7yCE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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