Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e3bd5dec6bc433bbc374fbcc66a525ec8a985879ed94f2684e0bd129355ee69' 
  AND token = 'K1jiPG6Iel3pNNIwdQLPeTqEEOhCdLmooeWpxPfPCWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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