Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a613d5f4c8293fff4908ced075eb68089d0d4c074c1e723d21693eed36f12c0f' 
  AND token = 'd3g1gxNqcOMkYUunv67DaOqmjjzpA/pSAUhKU9OTqT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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