Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5986f897be6e06475fbf740d14feb16b531c78ab9a8f164b6b6494eaf31d28e' 
  AND token = 'FGDc4QGToqdjBao4+TsK9sK5/3bzaAZt+vzAK6aQEb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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