Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d94a0a8d7d46bfcbeb31a85f59c371e269158c702688cd2e08e067a11084b34' 
  AND token = 'BgVypz+L3WQPZCpua7pK7NHLpemTdZ5a0rMxVyHfrQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}