Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9857637dcd4d8e464842a8772972fd79a223cbde1c6e3c8af68fe287ea925aee' 
  AND token = '+PEB6MJkYQbEkz0Nvww0qCJI1XMkLWM8ptt29w1E/bY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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