Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71e5b6a7f1f62c749df6550b2f50817090e8c9f1111e5b11ce1c1395048b11f8' 
  AND token = 'Suye4lpEIDPIUdeJurjzThkTnDhCIoG2vXra8nZzEUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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