Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93c65306ab2c40058784d9adde6cbc67928e0b942ade7f9ef32a5728ff6c7f64' 
  AND token = '6ogk2hj2ijC/Gzxtx8duDTC+555LWk/Yu73ikRajFdw=' 
  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"
    }
  }
}