Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e085bd8ebaf22db35c91d4bd935c62ffba1a4e6ea159b3a85dd65a46aeb7ebec' 
  AND token = 'TS57PdqYMXhRb6kpHYqXsTrL6GXXfUkYoAhehSI5e3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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