Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57d50dad9a26065b9d3c08ab0e57e7b8d2b717dc65c929b90a7b00e8ebf27832' 
  AND token = 'kKLU9So7y4A03OfceQrFFon3VD58K/iIf2MZvSTkwgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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