Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c69d47d53f338be957d00e41d87f958a8ca3b1c8b63bc9062b465fb1b0c3940b' 
  AND token = 'LqBjOi5HEwYLGKdQivIil4dGIJZQs08Cw60HsGMnc3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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