Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8227db39d0c8ec300aaf2b0efcdbec83f3d5b31d4885c187e387d4b6d8bdd03d' 
  AND token = 'rHhfoEOnWBTYVDOnFAAsKLqBz82orJRpMjs7THf66+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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