Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34a3bfaecd69f8d3a21469f4463af631867c820f24bbe83dcf6bce86711f011f' 
  AND token = '8tU+RF4TCmsBnxg7K5XA3xlAPyRwYKhJOdaRYLUmU98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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