Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dbbcd07c5c6542b98a43aa1814464ad565e2e517bcc3a37bab372135d3b82a9' 
  AND token = 'IuXZNnenzogyDeaU4tSXqQo5LXzWjAQGoeahVmY6/u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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