Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5698c46097199069f503344777bdc6ab43ccdd9b0d818ba2e06609aba9ce4848' 
  AND token = 'B5n/vfLTfHNRXfZmpd8p+mr6IDUtUkrM9o8oxCNKQd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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