SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfc19f72f8b3cd56889b5335b827c1b492ff69746f5d715dc6242701b8a548fe' 
  AND token = '8YnpQ+wxLFf266qSDvgXidxDfUKAboeyIC0M5BYiHuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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