Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0dc87cae7ed13b47f534e999d1fa89be99521f28ed565634c22b3ae76e955c3' 
  AND token = '2D2yKnHIr+BD4EL3xAmlPQMjYIjGWDPcWIHQvpMCbX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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