Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0f77700b615fcdfa5f2382bf64db8c5e97aea45495cb98eae7769df492af25b' 
  AND token = 'oaYToOTKK4tlXDAa6CqqAjoW3EgGNfsu7obzuSSBc84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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