Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e56c96e1d5f50efa95c6963f98c54cd54bb366a40f64562b38cc055787bb8e42' 
  AND token = '/ghpIhEyw+2MWU90ip0A9i09u3KMdPOgvujWdfONkxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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