Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '572b9d07bea7b301667170a1245fcc6a707c7b9b624a61e0e3d160442a59dcce' 
  AND token = 'MFJH43IDJx0qIzqeT/N71dCGFRYOAsWNvSGsEON58xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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