Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25f67e42f7acbe70f67210ef57c4e0af18b9bcbabf828b6983908f54b3783109' 
  AND token = 'X31+5DAQSQp6TantGNlpHvzAJVI8BOqBNNfM44vIPFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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