Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f06abf5968eb9876ecaf14311d7c9c0ddca23c3c37bf5bfb8e88c1d8dcf073b' 
  AND token = 'kRAh4lrKTeagBKBXA4n//0XkLf89x2yjoarPDrJcTGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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