Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ef126fcd3424bd933fcf917f0bf83c28cea1266c95928dcba745e39ae7fc809' 
  AND token = 'l9fS4n+xQXMXxsUYNhTvoe0RRKgzrOtE7j0N5yC6imE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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