Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10f36c8c3de8ec14de21e8e381ca9263e56d7fc8ac48e3bc4ccf5d7c436e67c3' 
  AND token = 'ZdISJe9plYcKV54rOr9UuLX6LAYFQ2u6kSWw27ZTnpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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