Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1d83c354ffdf485ae2b6e90b6edaa47a13acae93708ce1dbd140cc7a58b3705' 
  AND token = '/Y7yPFF6Y3MmnSF3GNHbDavZMYut3JaVoiMBLc84B7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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