Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '777cbd1484b2cf414527d67d85cdd7da322c6ebebcbea20031dfb9ecd7544a52' 
  AND token = 'fSGlUeQpnWdpsPa8EgUxd/fs+UajxrlE2TpwH3H6XYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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