Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0bc24297aef470e61c49213982126a43771d1d1bcb42abfbaa13be6c30a8e7a' 
  AND token = 'HxJuJFVw74T0yl+5zo5fWmLulME39wRYvZa810QJJ9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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