Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6206bf083d4fe1283222fb9080da50ec910b9be9fca6aecc66528af8ef092017' 
  AND token = 'dYkSGEsRLz0LOG0hr/+pMLisDTJHRX57iXQMQpW7pb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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