Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74210e518998c05e99f821eb13fbc7c36e776052a8df031a80eac3e76e75ddd2' 
  AND token = 'z327xf3WDzdY2hD3twDCQlXltrAxmyQgDYH7yh7OiuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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