Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c54e3332a7cc1c893069ca6003460e7942ea9d772715f59f61fc60c47f40af' 
  AND token = 'haK80NwEZb601PnxFVJQ6CW/kwmaRC1dBqGvrTxl8LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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