Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec9b04a0d62c8ddb4960ac930fdbcb2ed1cc3d13079f9c3f6c4d5b33a948a3b' 
  AND token = '9kiCGU+v/3e52EALoC0zZC7yrIpe4TAwgXl2/AGxvXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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