Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b61a875113f39f93b3d9757770e7f4a80aadee0957769f61e0b7b3781475d065' 
  AND token = 'WCtg31jLL1zeScAX7UQuIN5nKuPHc0sMjmjCZP84ghM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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