Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1535b50b8b82f63e03c2ae68952f91acbbf313f62e149bf40c6ed76e12f884dd' 
  AND token = '3Jyzv8EzDeUzXQpjvUS92PPjC7AhSm3L3ab4PlVSy9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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