Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6e98ecd068f814c3c2f5ccaa861e82150ed99c74109bc01e561d18a9467cbac' 
  AND token = 'uXmlXhmRj+jybGjSQcD/iP2W8q4SS+57CN6E4VJdzB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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