SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '895910607e40cc48ba28cfa7a4d2586ad76f3e7a143cd5190ec0fc611c713e27' 
  AND token = 'QYJXlyZpeo0je/xEXqIEIHKQcW4zBU40XarDANZ+QCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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