Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e4f7c81c15a287e31a2f15ad5f54130dbfdd97084a48a6ef86989cef6efe0a2' 
  AND token = 'Djg/PCVFKeYdSe6sD3T/wkowo81uQVOsyIdZKw4zQO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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