Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f58e6232af290fc23e87f5038167bcc5e86d4226796e6e03865a0dd716a789f3' 
  AND token = 'oNVafpT8zPhgJ4+8WhPxEmekPJiZxkZPDKIaWp3fHUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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