Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20e555ed4932d85d90f4009fbab7f9f7efaf47a4e15d9bf8f60e09947fe2453d' 
  AND token = 'QYhty580EYbuGKWX0pQr17yjalwNMhLY9lgZgFpiMSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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