Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16c2f14d99e8f7098de9769a21ec1af45d6b316d3ed7f0820ec686a20d8b13a0' 
  AND token = 'nDXhBPV7nGONOM7iZDY/h8N7tiV6VhxY6YMCzXphCEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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