Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac7edf38a218c35535769dfcc7dd602b0c2af955532e261b3aac399b628eb0cf' 
  AND token = 'xGscOAZucEU1nLlB3kMBODngQOupI0uA+/XXmhJZvVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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