Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcfe188e98290892d6b86ca77e6aafac4814a1d8c33a6775fc3db3c068ef2cc9' 
  AND token = 'q+ridIZSy6jTIx99c9faPVrWvDeZ9C1L/LydkUhm6xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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