Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1fd6ab11e8a6ac10fdd591146a47c752f79926e1faa5a7a741a041dd45c0d79' 
  AND token = '/TsVhsZg53Jg4grkcHdVuSq69iMBb24LHJn8t72iCe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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