Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '957d63d64e9a4be1717ebf65a89a4d3683532591a6ca81388480d8d4383d4580' 
  AND token = 'dbgIu4+xNkNg1bl1pYUz9LD9FMOtxJsrDaz6KAvMojM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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