Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afae237a072d2aa884837e89c11b6a3cfc3b85d248e029a70fb0b7eaaca2e07e' 
  AND token = 'csW4kf38DSal4tbqN60vDBoCU0fZnUVOrpUIS4LpbQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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