Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06454d0f07aeeb8ae6dbf76ee677b76afb7a90db9cc0671e4bbfc51ba492ce9b' 
  AND token = 'coIu7bc52uCt+N4ZoDXLRWQ+tEe0bCqtpdwA3c4OcJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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