Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c3257316a92839b73dc26da838d1e8735131a2f73dfaa6376f0bdf35ff9bda2' 
  AND token = 'UCbyhWpfH3IFvttvaA7lCNzsu6PlUOSOi26G+bICBe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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