Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ca2ac240c29fd48d7e55c7c642959058b1ed70e2230984cb523dc48650e3db' 
  AND token = 'f6yc6An7AEQbG1SHUexJ1LUDnx6/nJLZeWgygz2OSPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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