Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c05d49014786ee3dffbd34855fbfe820ac9b9c31db69ae2de67a331d81aefe3d' 
  AND token = 'oZpmMYeFJnSQ2f6K5X2rlnxLWrvFG3bjQzSINF8gpZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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