Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '052fa82e16c42829e0fb6a7ad5fc387403e95c2a365045c909a9e88cf607c4a1' 
  AND token = 'cl0JzHaVhRiutADl1ReFPs/63+vg2/ZfyT8ZCTdPooU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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