Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ede551482d4f53b3eecb6e95954125bc0fa311e26beb25f50ba9ddba889200e' 
  AND token = 'PTZwe3FIeTzFnR5RymLC6WheK/oWovULpsLKlFnEJd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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