Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e59d3e7c8da2791e6400630e0354bb3ba28457fc5adaf815224caf0bc86754a' 
  AND token = 'VzuIMt+L231JwC6MP3usWXkEDgwXXcie87KpM+esigk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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