SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '567c5957b7d9ae138e328f0586d0db3a2e730f828e7f7c37b61b86b8a290bc31' 
  AND token = '5dwVD4ePYSDzE7MiZm+k68xJuFJmAYNQO65UQJgKj1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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