Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6da59539b8ad86cdd02d0ea244cafade9d7e32ab2f11d719e97b48fda227ecf4' 
  AND token = 'AMf70s7Izn/Ld/sWFJAgBEC3O3MJN20BKIa+gVPtY7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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