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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '697bff489d6f01e46377f75b2891c1ef0de2c00d59ed016b45e0405910409767' 
  AND token = 'NetTTVszqfaplb5TQuAh/wDy3U8Nq/xApj14tC8rJI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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