Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a82217d2981b8cb282d474e82c16d6144945869dd1c0d06093e23c336736e94c' 
  AND token = 'lM805WzkJ9LWK3z4MgE9rVypUzn19vaclFh/5ZvQ2KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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