Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eec2df01abf4b0a7a43761b8f20cdbe1452f0040e879f441e38e70e72004f81' 
  AND token = 'leVGVhyPnEcOO3yOIPMIkg9uIqnVYuovV94o7sue4co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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