Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc27d79a538a1744c1fe6b5d791c9448faa3ab501999a72485616bcb9560b37' 
  AND token = 'fY6qjsdX5QUwi7YrX/5x9xsT5fnxPCwYOhdStwcKHEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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