Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66ed32cd8f2b4bf9b33b663ff1a8c198e943ce9726ccfc5ea073c5de1ff0f3b4' 
  AND token = 'S3eW/NaHFbKWLsW07IDg9uqeP78XOfz42LfUqXP7Dnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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