Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b448732a8e728ed4f5fb625d4900597c9c39830501fdcfee26e28c4bb3a7619' 
  AND token = 'miJxZPd0WRdnICf4V2g10n7ti06HpurrLcKxBtr1uO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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