Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e087c8733e5792d4ed2c5347b24ebc37967b920a536c25b5df773ba041a3d1e' 
  AND token = 'AMGZrCYqg0bQOHuBjoLxb432oIMiU5QCNDCiNSvjcFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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