Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72b193d72b709fe2453f95f34a60a7cb2d9bbea6f75ebf90d4f766df3726750c' 
  AND token = 'RpIc4gGg6x6PocFv24WXtC5qJNgkFLw6oNKQ7yyS2uI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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