Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9202dd8b22fbf1d74c705a8b26f4e8e640a7fefbb13764fc6290644efa9d1678' 
  AND token = 'tM+w4BthpiOuIQEBvsbbeYZMJad8TdeO70xTjJzj8QE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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