Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95fe01065492809526a8cd40e3ef7dcafbdc6753a29c5394af0ef874edd237cb' 
  AND token = 'YQelIJ2wYaavgOyBiTBa452b8stfXp/IdjH5yqt/8zg=' 
  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"
    }
  }
}