Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f07382b8acf08fe3bcfad33f27c12a3fe175589c5aef2303386b902787d000f' 
  AND token = 'eLdGE4/sKqb1JfQUBFHvM7SOPl+IB3zCakDwgNsRifU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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