Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd1644e0ce690ba0ddf2f58bc41633a050734147490cb573164ccbfcccca18fb' 
  AND token = 'k3Y/ifbDCEe3ykedx2zcBcPFq9B8P7yw5rG9TSKqftE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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