Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07af095ee505d5ac176082d05d5303e9b63830d86ef0572205b65a9f89595f98' 
  AND token = '1y92Mn2mwKKRBB+fuJr3ZrNUmTUY3yYBrGgGGER2bOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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