Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f79e61e6cebbd6ec8d347e28f2005d06e7c8efd04dfb3a488468f7b1ab469e8' 
  AND token = 'xlxKESDvohb/nnbarQw/GNs4KU2b9n4EAxqC9zJcgUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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