Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '549e28869eb05e08929edb9e0589251784791100eece606dd34dee8bfd18587e' 
  AND token = '/ePr047YkCz+l9ESN5UwOhPZGu8l2eLK9kjKDHU0cpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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