Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1a1a23e7ef2a3965abc837d413b50dd2baa6129ff3fd6d9e0272c0300dbb54' 
  AND token = 'MNUoYsTEpryE0oW6/R1RQQR345GnyaEv5LhcAesJQtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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