Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecfad93f8afc404dd8bf2580b2e13b98699dff91141f0677df23c6314d2d7b21' 
  AND token = 'Ct3lbkWm5OTJopBh5ZIv+dOQPJbrgezT8O6VbfkxmNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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