Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aa5c75f58c8445e826e4d60a847c23758016b197ccbcd0493533e34f9b18de4' 
  AND token = 'sCbby1ZQunVXGu2Jf5jQKoO3AUT2amL7YhO6SmaapDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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