Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '099a5835b613e50781035293c69cb3611fdc89d6f6c7e568648f55362fa16859' 
  AND token = 'uQGNb+uESliSBNTkOsNGhnhkksPARl7eHdVHNpsQtOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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