Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb88bd9c77ffe59f66b946090d4da6ff9cfdd0451ef197c1d90dc4e122282a70' 
  AND token = 'rmAizzmANMnaI+gsIS7ZqAAetAP/m/18TfL2FBKaG7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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