Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be077d9c3d77dc1db9ad61876460c1efdb4a069bea7cc43b5ce623f49f915576' 
  AND token = 'a49eOu6aVsQsgvMxfECHBO8RLR6FCTkqoXsI6/pYRGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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