Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2649fbc1b4c1410d4e052f61ad19143d07cb538122b347222dd232c7e58ad7f8' 
  AND token = 'D8Rs2URiRUitG/VPANfKn8MGf9WmFVb1Zj2lOGcJKOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}