SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad0d8c0d9b510b263711246917823161053c5d9cd842bd0d305e2e5da01874e6' 
  AND token = 'gYCYFZ7ifuaQTMvziZj7gL1AXfNGmp/EoVWmuRhuG5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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