Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b74071e5df98a4e8dcaf24b70f1e9e9726174c8923b11e74be4f46729fcf3e' 
  AND token = 'gsSo8YZkcac/ZelkdjOlisFGJOUhRb14G2wRrpCiKAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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