Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0836c61fc2ad0a048c4231abca4a73ff2a0a7ac1dca4b12e859c812ff3ef1a31' 
  AND token = 'M14+VuwqZi0x4qRYV0wUszW/7WaiUcfKe9rvLQOqB40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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