Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81aa093332fcc9c3f49e9a9c5b50aaad2392f1164e98fc83a177b4ea1edf97e4' 
  AND token = 'DJ7D2yeSJflkPs0R3SIKbRMVw3qgciNs7YK7aE//3hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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