Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0e3dc18f49055fa47db49218b37eff2c68117a838bb42654eef2af64c92ead8' 
  AND token = 'BOkAfqN9MbyetJ0LUjYbflbPYyKkBkTU8tLjCtTx4iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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