Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b57e4ede9bf0a74623c0084ce393b82372a9271178475e65808ac9802cf619f' 
  AND token = '+F2t4c4XTfH7TicluvqLtEV7/+CNdQ154QfqqlYKJK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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