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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14a92e077e679ff9e7db99b5680d5007384782582060d587fc1ec37943fea873' 
  AND token = 'qrkgnE9ytXWi3ITnAa6EC6j+xvH7fIN0qyWM0VBOoYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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