Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ce5997f6a5dfe09b8dc0bbb58a3af0423320cdcbe1620ad4baaac1d6a124209' 
  AND token = '1V8Mz2Zup5TGtyzVfv0aCRUJkJNYLVfCEbTvA54N4uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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