Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '240c4217c24e0583a4185b3d396d67279ec834b14d5f37a49492f2eff11b0be8' 
  AND token = 'B1kbxdKCnJzwY0zGiHObQpHfCzcFl/8eNoxxU1ZgI1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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