Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0528c49c49751ed311f73c01393d323fd9b2aadc24fed922912168cd074e4f9b' 
  AND token = 'arSBI0VqoiHK8+EIpyXnx+PAWBBQM2a62NUYcVrHmi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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