Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70eb4556e2c078c6affe3ab273ea940ce99beb52f009b538f7221fc4d840b666' 
  AND token = '5W6bioO+3JXLb25bqQMA9cb+Wk5vxQhNtUx2BnDBMUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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