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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d560e60c65f1743b94bceee980f5b2d7bde67ac903aeb95e98a416ca753aee1' 
  AND token = 'dNJ7BKBryESJHUUcA4JvJ/k70iV2Y5dO7bbe8195EgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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