Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99d968fb34101ea19195acaf7dac89e93c34d24cdf913a2fe082f8d74efa6be6' 
  AND token = 'bFIXrqKdbGm0iPefv87knh/58osakQLNZDjivIJ1bGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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