Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39b46965950ae92070fa766d7837beb25d5fc5f8efce9923eb18066796e376cc' 
  AND token = 'QhWq/p0DqzO5Nusq/FbLV95XBTdaJUI6Y0+tZufwUkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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