Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd7fbfad1760c883f529879a29c7fdb46f9b65fc045400e0d91aed2cd5f3f0bd' 
  AND token = 'gDIwmNB5xnTdh6zovUeu3zYSSB9tuxzAbU4r8WzSwpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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