Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e897346edd3795f12b291b8aeb2447b7a75b8e40d9df599556cab3ee09ebab9' 
  AND token = 'HoMjuKnvEba6q6Xas+dvMHuQTsq/eOhSIXaYXJhJ2YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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