Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fab9ebe57348569833386321a9c6a7697c9ca7756b19e91915e062c338bf8b09' 
  AND token = 'C7c7kenj9Dl+uSXIaGxNxSOKoYW3w8I7m6Di71UrlYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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