Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e13bef1ce9825517d2a496cb54aa38580a407a50ff7a4c0e674cfcd5903202da' 
  AND token = 'IISqZHas2DCXoLNeP71B+BIXmMZTQu6cXq5up8Lgvvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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