Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '240992537f6a3efa932fb35e078845dd81cbd328821e068d48295f13bf24c495' 
  AND token = '7Azn7YcBtiLeDbiac3BE3v6I+7Ym3foNP7/NwU2Jok0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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