Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10112c3cfa61734b61c0d1646dfa0e279b61eab02f0cc89f4d5f9b4f8e99a5f9' 
  AND token = 'p+b2+yqGzJoGcPwNvk5OFG9gHBnun8ElfUeY60+1H0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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