Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b31dd56c9dde3094123d9a43b919e0786c7e9dded6dcf85d56fb552061314201' 
  AND token = '433OLd2MY0rWB+asbZyIwtGwe2dwRlwABsRCpv7vTBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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