Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f61f543fd3831545f647ac84830d9f67428725d8b04939dc9da43718134cd929' 
  AND token = '+I3+BIG45THzHbENevsFfNWVQRAJWuR6nbTKridpSoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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