Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27dfa6e937ebdcaa0ab095dbd3e78f5d8233ac46cc8f9d67bf66047eb404e5df' 
  AND token = 'yH1npdmwnwSe40nTPyz35GXN9qO2TatIx3KOhzpRoWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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