Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '681cd235434a5fbf3614eab00674301319a3c2aed5f9d92aafd6838d30f5116b' 
  AND token = 'qGftrjx/5h8Pu/9Kc9ogT9ltJ5HsTgbLwsJbwCb+bmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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