Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe6f2beb23acecee340059f35472c1f5080632cb95d2e184c9772724f5bf3455' 
  AND token = 'kAV3HCGq5PhoUdZ+C6JdcMmDGPxmZkniyq6vqiNINJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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