Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1e32f6ac51390ed7a4dd43a11fa0d25f5e04e793f83e96e2522507a541d5d52' 
  AND token = 'rH2wWnerKyix49JW5IJdT88Eyeh6eFJAaW1shc1xvi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}