Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed8d64076ab76e704b9dd296065a9276773f28e91d4a86dd00684bfa4c59a8fc' 
  AND token = 'nGDoBY5chNStChfTM8vd/69AAiroP8aEyq/gIA5EImY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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