Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '073c4ee122210037cdedab9431c97e52187b35069c792fb301adcd218ddb38c8' 
  AND token = 'A+7zDSm2Mh5K+JakjrS7HaPc7IqW9D0PQsUGngI6OEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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