Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55ab24507e24062dc90043ec8eccb01a9de8c848c7b31a0c05a4d52baf6d7309' 
  AND token = 'w6Eas/eY6EcvI17/ZPnqjzMkab3ZaXzi0ekT9ZonYRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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