Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8842adb9ad52082c177e2c251361c7d4d0d646489902307aec0aab986b7bc14d' 
  AND token = '+0dY3Lv3CWIWlcgxqwb5kIZbEvXMarW7LxhN4jENiBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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