Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d32b4a753cc8fc0a4a8b2b5da5bdc96e160037ad79300c7d1e071dbac3473c5' 
  AND token = 'YJ1E1i15S2/f3QXump+ntoPMTC7+QqH6Bq62nd6Erd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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