Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53fee6667331990cb2d37f2f860e6e7033d6a3e3d6d75abb49cf7093d5216668' 
  AND token = 'ABtOifzdY7b76Tt5CYeQGEdlzBywMcMvMMe8h+xkflw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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