Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b650f5f061eccbcdf8ee368a3f9f00ddf8a467d49c953c53dbc07fcafce5d9c1' 
  AND token = 'FG0yj8p1AT1OdNjrSSEJypXOdux/Jr9VGM4y1m0m3Xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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