Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a7bf695f9b1cbea05483a3175ec06c9aae9e0d08cc88ecc89bbd61a17f02e95' 
  AND token = 'P2dTT4fZF0ovp8C7MC4XmoPDZehvkk3s5vfoqEk7/1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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