Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a13cc1807d8c3c269e82b6fefb24ea12cb113b127cd2e59df3efc69808a0c43' 
  AND token = 'xOhKMr2M67ZGPwtx1heJTuZi/37vHP+dhlASitKb7YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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