Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14e856099d944c4de5198630e5885530af79df7447e60e2579fab55b4ab4e05c' 
  AND token = '3BVqnCdtEpf97+WVd9EEhKmgyX4zKO7lMw5TBIZqv6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}