Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afdf002f9438ab26f9382622fa4138f353c3ee0597442dffd19e0c1020b4f7c0' 
  AND token = 'J2mUMeBMMVtjBNU5MQCwO1IwwX+uEAfuXgushseP/q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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