Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a2245aee78afbb8ee5e23423e7ccbf399eae39f4c6d079e4cd8ba0bcf76b289' 
  AND token = 'FfTcs73nyYRjqy5xxzJ5x4P14xnVaJOHkHsCWRDForg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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