Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '12640ddb0587b9503e47ec0a301315166d8b1cc09c4ee2bd2c673a7c2e5f347e' 
  AND token = 'pjtv72Q2nDAYokDi7AuwKzLKimT7pdyNpYrPwD7RCjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}