Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd269675dc84471a3524de637efd8b071497f420a9fdd9283137c37ff964559d0' 
  AND token = 'E+tjrZncNenXzWefE9bkZ9mU/vfmzCzIfzD90PYXczs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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