Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '849e014ea9064aaea29477a7dd397e3d7a90c4571b0a54729c0cd7933edcc1a8' 
  AND token = 'vyF8dcGHaph19C2pQ0uu82rTtXIazXDqz/M4ksy4hb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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