Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e576f592691166909103e082aaf5b897d18ce606177bb75068a79edde273827e' 
  AND token = 'YV6pKnJzrgxts/nnmpwXQ/V1u/RyjfMnJc+7xWXdpM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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