Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '686e0073f3ed9c8953be5bbbfcd8579b6a5d4add2a3b5399918ac58644981468' 
  AND token = 'G7AKs5gK4sLp0SMPYpzODZfWkR6hFxfy7Y4hOF4AfsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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