Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35794c18b157a0b320df79ee7792ade672c4e82ef90a39889f7ee27f8aa830c3' 
  AND token = 'wua1V/sRLJI6TB0IKdlQe3qOqSWA2Tp/Z9LtEn0X3mY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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