Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fde758ae75a2b886fa76a4e9e5190e1bd24c944ee03d43e252394fc0a7414188' 
  AND token = '0A6eW//9oUBANZv5ErbvMYIG4aKeI2CP4wPDrF2rsKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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