Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '094c5eac79059ee054f24f88668e7c61aa0179fa3c98f0c0dcb93c66254f523f' 
  AND token = 'S9n2sJ0wmvf9pw0KE8+55lXb1ckPpIJceQPT0zU9Cno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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