Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '46c7ea8d27fb005ce469436011c77eeb9bf39630d05cf222ff0a64953628a733' 
  AND token = 'nvZnZLDtWob84LEL+51xwHTh2qgXvNQStx50o7vIryQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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