Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c32b8d80deb976ce5e112024a98b0c83b269a92a9b571bfe0cebad6205a4c528' 
  AND token = 'qvQ3gj6EbQtaIwxNJjXk2XXEX8FCt4rLPe4BOIUAE0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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