Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f55fa837862a55b47135c7ee5a424ef95e39f3a70cec34caf8a212682308ae94' 
  AND token = 'J3qI6wn6smNlLXe810GWQkJVGBDVNtXryx3M78LBZNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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