Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6ee131d6dfc7628356ec4a3ae5f8e6bafc76680893297cdf9298b8b0e772e80' 
  AND token = '6vgCLenFLW7vprkgxRmRUXdGZtXLPkFzWjb/ddRdeos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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