Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6f64c871fcf64d2761e48ac9f36ddaff8b93e705e684a9677c1f384683bf233e' 
  AND token = 'jQ+PX7zyAlMK060cnQp+v7EcgJjLqp/+9kkuucKQCKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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