Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1c82cb80c2e8cd5703e168843a99525a4eaf58cbb2ae3386cea2370cb547ebd' 
  AND token = '87OD7qVJWXEiEol3gjXogF5Bg48klh3YCuPVBuFwqbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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