Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a01d17fab60097954018b7bccb4c8195d8010e7580a3bf0101487da2af8ece1d' 
  AND token = 'lKi9e7HDKpBcexWoT/3kZ9JATGjV2i6oZ8EEg2ZChUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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