Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de992f09a7d98742bb9330a99a2c1eebefe6941f4245ace8ca44a062e1e19f3c' 
  AND token = 'od2JezRohu4dnJ3zNoeF2XPgZpdjzl9KTdQxMrEf+1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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