Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29fb3c98fdfc3abd2daef0c3d4ab3b8c210dbb2a7de2859461adffe3a7a9527d' 
  AND token = 'OEsnafyRdNvfByZ6Ed0IGE4tSPjCVkhIb0sJhmuVvSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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