Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78036ead27d8ff96678f45c51af3de03a4320c1915872aad08b0861dc6270691' 
  AND token = 'v7DpmzBv5BKPCcjIGM+lv4ob410m9BCahPl0NFMcJD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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