Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8940ee0bb89466229683803a5dc028a3a50711deaa06beef99cc852410fb7fd8' 
  AND token = 'OMzE/OCVX50x1h1ZkyK0dkhbJFkfRgl+l5M1JCmaGgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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