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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc7c2ff0c10aadd0054c3069ea35992cac185387dc84cb4c8953b4f29bfe430c' 
  AND token = 'Wm0pUOdgn7GEiX6aRlOn/srd4xBt/PDpY8kSeR5SSis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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