Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f2a0252606ca617f69ef70c20fcea84a66a9217f1f2d3ff20c0dffc25b089e9' 
  AND token = 'GsNjQ850xuUL7GHOjFyTeiDDreLvwrOzKRy8OglOHmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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