Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1904023dc38c0c3207c60e520530c9dc73bfd188fe79dd7e4bf0a70cb82d8f6' 
  AND token = 'aCFjCff8midHtRc/bDV7DDkwbV2ieaR4E/kXu1sI68I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}