Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e17e7cd9b4490c2157f38098d9f7d22d317862b65d3bfd084888696b9110f66' 
  AND token = 'hQ5ZJHiaJ4ggh2ln9DOgOEOSiGffCH84afjwQD25JAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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