Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '966bbb20934303a55610586caadb32e503c415662ef41060a3bbd72b089ba0b3' 
  AND token = 'wVNoDIqhM4Q7etYIDre+pl8ve/h9NuiDLZrtahzE+6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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