Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb4d70679e9a492e60456526d1021f852b15e71002d470ed7fd16ec85db069df' 
  AND token = 'Q5YKT9LC5b2+mue7ATslnZKDgqgv0qownscjKON8eMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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