Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6adc7950bcf45f6fd4c62a7b4d2e6b8ee96b75d55ea5afce76033caf4f66c65' 
  AND token = 'wJsugL/gzv/RSN8mw5+ENAxrdZ7YQSIxx8hYJxX2SWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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