Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20780364036102d5542d578917fb92f9bee63099ad4e37c8b9df1300c5822b9a' 
  AND token = 'ibL7pzknqpnLBdjeijAIPjGHoZlkQWRpiTTz+ko5q8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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