SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '832b510291578d81f55379827e76b0b695ce98b318dd98b4aec8c7750132eaf7' 
  AND token = 'nahw2YjHGv/jbKrI7B9XzUPnSJ3scoTy7tb3dqmpmWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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