Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f0cbfa5e953c1d21ea40f57e9f4f99c34edbeba725e2fcfb410626423ae2d35' 
  AND token = 'T5AdEYWArHOourVGEokZKtdX8N9pP29SwA/gHoMdfsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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