Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40f411176b706e9770eeab22b124e0d7ddfb61e9a971d6313ee5e1708d1bef6b' 
  AND token = '/mtGrr0DT5a7wzYsenF2ZGDcuTJArERqo/rz858dqoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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