Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee53c3b04d325cf68e1068506a61ad77dd0612527f91f360eb12bf15b5a376c7' 
  AND token = 'fhTKEgsOlzce4Rg0uH/4vhm47oMcZO2j/6QWFEuZu1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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