Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a4d03d7661380b3103b8fe3dd3c5fdde611c445908c7be11fa0722afebfa02' 
  AND token = 'uaqtTSgb/4FTZa0wAjR11YRCSKUnwKYgFQtQpas792o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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