Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7db9a0447c0f5f8796e9c9584a4cd63710b841dfe262ec90278bc977f176ac4' 
  AND token = 'rqZ1eREXintwDRJbvEVnC40mMhwoe10uKrqPRBxslJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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