Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef37e80ed390cd025d60cdaa4457efcb001ab4fcd0c8e8498529e207e92b9319' 
  AND token = 'fVdoscfbvV+TZ8/Tr8anqUZJ93k5w1290FmLWmHSCV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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