Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4dc1ae19ee2abbf24efa39045c33c4da912189c797a66e3cad7f36be30949d5' 
  AND token = 'wzul5okhQCs6ej0rJaeOU5oRSIeRQe87quiemjcfj3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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