Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7102457b5685a97ca7677a97ce09ef8e347408becdb27eaf1580801b65037f2' 
  AND token = '/73G1z4iXou3BebfH0XahPfbcy6zRt+9GAVyc115P1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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