Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cfcab73f0891c0dff5d9dfe7eae7ed609729b05d943074d8bf601494d35366f' 
  AND token = '3vZAGiEo26KiCWVihp9+mAOBhbG8XgiHAQZn7Xei75M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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