Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a3dbe7676e839336c0b6e93793b49d99b7ef776b3d0ae19472b6e93ac7c6073' 
  AND token = 'hTZ0BouSQKomCOROsWpctQqi83rJe0Vymt0u4W11las=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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