Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d57624da0648d93ba08d4a64f0ea32b76a59e2744dff5baa3819c557fed44a1' 
  AND token = 'i0csxgamerWkNVZ1KB7fbNhtizJPpNJRwYXlEPYV448=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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