Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90c90fd8f85796c772aff399b3232ffc1b05fa049fca95cd31179f4bb4cd6ed6' 
  AND token = 'VlYbw1NEYUiZMckyrlTithy7WuyJIJ42cocwd32GVlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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