SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25a3d2578fc948d72db6b2b6c506802884ace171773563fe0afba4d2c71f10f0' 
  AND token = 'weq9GrtZ+SaUa/LyrzIR9RxQTcazvQ/iXObD+oN+IBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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