Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bcdfcd69ef107e6b51102b9fd85dafe064c558d29b0aeaf9262096540fce219' 
  AND token = 'TiVczi9SaRdTGXCgU2gP7qFKXwczIiHd6sthkv22vtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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