Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a99851434536b010f9e77415533101b1fa88c1e41f464580860835875a87d80' 
  AND token = 'KZ7WBLU06aaM5enYrHtCo16Wf8AT0xTn/ZEMLLi8IZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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