Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ddc11e7d8fa63e7885ce527c6a276564ec0bab5eb0415748bb425a93327c344' 
  AND token = 'ZleOXvRW+X8A9aQePHU1fHHIul8mVGSNfKLffvHR1dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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