Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e3aa424c736c63e338bc58ea99c6fbf8cd37298a3ddc8bc467caa6ba1bb63f6' 
  AND token = 'dMpTGOLW0zOoVUAdYzrWus5kA3aGmDEtkcyZipkcrsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}