Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e5eeed08e211b51558beb1632270a59a3a304a536c7381e9e962075d300cc3c' 
  AND token = '8xQo3lPRfWiGbfexfZechFC1yBPSvN7cAW0ZZJ5khbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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