Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '753496d831c070cc30b83b73f2dbc24ffdb72ee79cabc560a25bcc27e8d2e12a' 
  AND token = 'g6jyOWDTDohjs2amEOev1DPAH4Typuyq14ypEsrXj60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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