SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9ee9daf3346dace4bc482b6b26e9891a1ec25b5ba351780f6d7ceca8cc23133' 
  AND token = '8nbPibMuZYgvmpUgKIW16uNw1m28/t1B8Hz2WpGjWq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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