Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d3ed9bf834bd29fea606b3ba1658be11845459b1cd396af522779083760ab8c' 
  AND token = '74tZ52bXZ/UqP7lF1qWj7Uyx5fZj1kxAd4okF6vv4pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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