Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14c4aa8d1b507ac98ca3eeb6f9343c5025196dcd90376f5b90f1298fc85afa8f' 
  AND token = 'UNSxEPibgFkzR/l5ZqgAuLvs4CAaZQurkuheMtWEzeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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