Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '235943f531e9ee8258e79e558e7016f8de9d605475f38b4785620545f66c69ee' 
  AND token = 'MX2FFl3N8BrEkkFKAS3ZKYz3x3cigLC9ynPn4xzseSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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