Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06da4086eb0ea563d02eb7cf4c5b3054d31ef74bdd7d1038dbe3542c68c50aa5' 
  AND token = '643Us6wQ9dGNs8KB9NpelN5lycp+nExVpFJ5Bg6FsZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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