Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dbb349ef127c422c3298e2df9346d14b252a853be426f67b0d3b20dc1e20aa9' 
  AND token = 'Bwylyf35wclnQzvLFzdm9tDahtOvKKLv+4w7hLcL7B0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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