Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf822afdb00b5f22e233b3d4e148373f9e21df5c6e06969808f6eeb34f368ac5' 
  AND token = 'cAeQWmvT/f5JPcdOjLJCI82jwB3IrB50DabwfsSXDlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}