Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd22f3dd2035557987d473afb178fceed45eb41ddf2004c1d7fbff6dfb8394748' 
  AND token = 'jh2AbBXjeBuGS8sTsr0A97hFx+mCjGDdrg9KQ9nc2q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}