Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'aa9811145794988e00a97e0e72d18a9de9b6ff25d8a7ca08bb5102fce190d2eb' 
  AND token = 'zOYGMBqdZC4mIbO73xRys3TFt9T6nsbwhG/PBadiXyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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