Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b397da1f2b58e2352f44664fa6617eb0159c70396c5f8396ccc2359ccecb07c' 
  AND token = 'DXGcWh81gFE4wu1Bnnthf+2WbAVYyAFla2lu64/Kg9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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