Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14eca6a8c47791d3e0a1a827463837f721dcefe5da7f103158130dcbe7db6525' 
  AND token = 'ZeF7IcVjGjHWccC873ujCkWZVhwv8FtmiXLL/7Qdxh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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