Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05f832171b64458409328a4245bc9d59c8f0d873864706b3df5a8b1541e88ca8' 
  AND token = '3U3TXk4j8UbNO926AfD0BMStLepvtgZeASrVs9J2Wv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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