Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fa04f3f01a58a273d2a1903e05b46030b4d771a1a043c2587db0d9353474dab' 
  AND token = 'YRTVFJXFEeMrxgjUfHEa+Z6lIaLcR81xU+oscTDGrZg=' 
  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"
    }
  }
}