Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a12f280e6d8447532fdcb5128f9ae260be02ee6591add34aab4d8595b4d2598e' 
  AND token = '7FsjJIbia6TyyNYEkozOiLWC3r/JAgnWmA/j0V1xuFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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