Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f40691b33942005aa22d01f23d96513cd11aaa41487a290780489145eeea57c' 
  AND token = 'keqDrVTTvi0TzykriyoEeUp2lbS/60AzCTg+K+q+lnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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