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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88383fea662f1fd25d272d9c223faa8dfbca6587671f105babc5c9170fcc6d9e' 
  AND token = '/WaoO64UPu/qfs7JicwWsfvw6F0aqcPZgl8Fly9pjj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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