Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50d183fc79149af42ffc42a90027952be863f2c4cf6318ba7d6d73ba74331cc8' 
  AND token = 'pWz4M170cAaJG64J0bKDDtM+eEPP91l1jzEQUtEzh5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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