Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7918af26eef642f54b7986160bd2ebc6729564bac05fd18b9a2e58da3fde8553' 
  AND token = 'jRyS+pKjyGXcOcM3r9vqKDDVIBf1xyJSDqW6j5dfP7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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