Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e454b9c3dbd9792825549454c93de8e29cdf76bdbab89c662279e58f977643a' 
  AND token = 'Qfnnl/6OZHdgovwTUiodxibgyMOizQ7Gaf2+lr5lW0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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