Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4326ac5796d6df6c0bfadeb12adc04ce0a27c56a6df547237d1c228522234d5' 
  AND token = 'g/7m0gjrxUcBx2hyYyZCMnvt6S81zuv/Nj85IbOxN5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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