Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b37336380cb54c2c4838158efb70af6bdb2c37d2bd4d758d9c674cb1e7db76a2' 
  AND token = 'Kwo74FMvul1B7aRX/togLGuuRaq0e3lq2fQLJPmvF+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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