SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '157bf8e81012c71dd5d87c01f9e3830d8750bb6301e9df98c6ed8359eef8402b' 
  AND token = 'BYssCIMEdgUF6OScX0iQKJ9OSZGMf/KEHWo+T2h29YQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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