Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccfe570a99c360337f9c73284242889959b5cc7e6baef57b9f4648b744d28517' 
  AND token = 'vfpFrZD9rh53afURJsnos7kKeC2ZFarYQem2gl/fsG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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