Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '1afe7786771762a3464873d708685fdc30411e9c63634c20e850d4e1e2827d6d' 
  AND token = 'j3vE+KL4/8nwps9wra5fSlo/0/33HVh3IXCcoSqrVXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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