Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '29fbec6c81e134bc6d4c56947c053882a4e85d978bfd6d48f25e3d1eee3564f1' 
  AND token = '5YKzZRiL7pcNZSjT555GKqI1jlUIsXcRbAgxMpHIfNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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