Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e1329c2e0b0b8e905d4743d634266a67bc4b9d48293fc07deb40dc27ec5c20f' 
  AND token = '2hhMqMvHnACvDjDas89lqdWQzqabC6eQhToMNnuhk/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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