Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a92793f0c9d299e8c817e1fd71e6f54496a9ff8ce5aa225cf5d6b96d5a3ee6' 
  AND token = '48tOjsXUj6GOP7dDHr32d7UIoqFbZzOHMMur53ohOWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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