Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8aa52d10dcbfbf5d3a4939cc47fd978caa701a82e92a62e1459f944c13ddfc09' 
  AND token = 'qi9cqAgCpNN8A3hHqOCz6Bxy113f87JWhgP3sFUnl+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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