Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4055dcfb828e42204d46ef8c8e85cf1338147a8659bc223c75aa79e221744a17' 
  AND token = '4ZttV1+EnnLtND9+YLiTDwDvitxoGAzlSr2mOKqb2ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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