Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cfca7dfcbac049ccf113d81043c6742dd6ce39fe78e16893cdd1273942fce02' 
  AND token = 'QrcIHLfentyJ6vhXOriT8BE2TN0N/1BT7Ou2MZmOMVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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