Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda192f27bf7548173dc43d1b3ac7819151d42baa87453ab33976a823188bbbb' 
  AND token = 'z//+pBO+klqS6xoT86BQ5cDSFwYMcTILYk1pFuB0gU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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