Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff437fae8c39274e00972b8d00ee96d1ab29d084e8ac30ff07c6d5e98959cf12' 
  AND token = 'PEQafn10iqB2TX487Pk4hk5QoXI/DNAk0satoglUYHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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