Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '398df95576c051073ee0bf674deff9925b0a4bbdd709a1dcce9e8ccf47e3ddb9' 
  AND token = 'wrc5/8lD7Enlg10UbVb634aAUWn407HF3N5Z49fyq1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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