Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4700b467beade810934e79896107387c65a94fe384afdb0f3747c48c272ed792' 
  AND token = '7Hr1J+Z/7fW4U9k4IkuNZ9fonKP35bFk+8nVGKPq74c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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