Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '261c2b4254a4dca945f281b25abe2f735410967fc55cf9b00f58909d8b700cf2' 
  AND token = 'P9c5rcfHlwugcT4yJa8t/2s/jqr5YE6L0pTz5IMHOFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}