Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ebbe17f0a4db210b405466b71b66042b71c7e942c8a6dbec187bc118c841c41' 
  AND token = '2QdNcJO4m1oTTsbmj91sk9z1HPSjIBQ7+f3RVnSm+7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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