Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f8b7b93a1fef716c6c9f5fa53c35ce63b53d000d2d13417fbe0c00cd51c80e7' 
  AND token = 'ymjUTJNgH5O0nKYmdeio3lwIT/I3ZGRuwgRM36zFrAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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