Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd470d7e8a555f8692049c5256cf308c1639c51636dc44c9a80d67fb0b49d27ac' 
  AND token = 'BvcXZylTsikbTGUtZ6RH6xZt5aYC1FpnNiwSCNgjZcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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