SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc35478ea9ca2573514ffe24df0ae9cc3646b30835094b3683e88418179c4cf' 
  AND token = 'v+apNOXC2fvaUh2bsGmqzNmfKqP1/7FEIHge/IY6bzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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