Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00e54f9ef35e30fbba295edabde2acd74dd1d50c8639b7364b4b238e698463ac' 
  AND token = '7GxtGAPfm/TEZO9gEZZ314ine2N8ApdSUR0q4GaYlNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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