Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25dc0196214fb939c010e3f0c3cefec2fcc5e62012c01b2402f837bf7b5b40d6' 
  AND token = '91VYfxwrXVChpxgTd8V0VKoqjTGRRAHhtsfGqR6vqa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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