Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a499b9a46004ad5b1c69792165ea9a56a167efe21cc03403490355e24efd7eca' 
  AND token = '8UzK2HbcfkuVxyB7OgtD8TmkHn3mvx4J+PD8IhJ2Dpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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