Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9b530948c9175bf588aae7d611290376bba3e6a7b424494569aee2367aa078a' 
  AND token = '6GJ6U/LjUWlC/8WFRDv+d5FAUNDUanFjoLHhENOKCEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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