Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '911a2a05bea7101d85e14cc2c201aa14ee0c8ee8c27d992e0baf34c76b4bf9ee' 
  AND token = '5tyja9A0Niag2W9o/LUDFEzHEZnaEJv7AK8dcEDZJGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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