Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6827d1ec77b1f283716f4f3370064f27585dcb825cc7a011a330c93a5bf449f' 
  AND token = 'gdzavyrvKZb+kWKO8+RVfPfoeI48AwAmRyvI7d6Zdmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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