Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ccc97e71a9bc86a43a094ffd0edfce18dca459cba5aaa1b142f33f23ec9bd6a' 
  AND token = 'tCtl8E+6ChdyLMnFv8Z/4M7K1oROv5dn+nYTuVrc/gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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