Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e2605885367495693c3c308c7665330bb9e095ad4bb687ee32bbd9d2b320215' 
  AND token = '/uvmID3omaDlA3I0UVteDYQPZ3v+40dKRB/jj0mOYvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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