Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26b33596fe5abc6ac108f1b0506a602544ab147f5c0fd6985eb830e34cd014bd' 
  AND token = 'Obhjgsz5yVDPPi0Q0hQtPVvhrxZUCUWVQvXpaDyErcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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