Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2af0d1a6e49a865c3d9bec85163b9b8220d1fd8b2602e114e5be36d074ff599' 
  AND token = 'Qg+y0D7zTNx1mM0TXE1sy0Fd8oj7g9l9lP9pBxBwQ1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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