Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ff8a90ddbcade49f61b77df9af43143ae0255cc8914f9cd7f01e7a4f7e6d088' 
  AND token = 'YbjR2dGt/CCfo8lpuXpZLznOq+h82Ucoi4O8shPf00Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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