Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b5c41deae995e53c1f9be0865d62d7e3e88ccb0ba817de31558b86311ad8abf' 
  AND token = '6TSWGhs51E+CWv+90EnpTHGi/ZeCBeElc/6iDJzXiQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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