Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c385c855d37a2ba434727ebddfc5ad44ab3625ed01a953021e2be65e1c004ae' 
  AND token = 'vbnhF996DXCOvKJEmUItpMxD/NWWXTicSrXAtAyg6og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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