Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d2c0e8032f132c23477909a789b599e319dffd05f2554147b8e740462b734a9' 
  AND token = 'AhLH1ThKs2pkQLjSvi9VWPWQ64pWmXZm1RhkzRF894s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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