Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a17334004b62356addb68f5d2e90980699fe3a5f91e8c821139b861b48614cf' 
  AND token = 'g6tOsdNSYibQKtK0c+HZ+lFaqxN2DcLt5e+d66GWKc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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