Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '847b5bb4d814156ae8867438f67c3c07a6fbd13d6723b4686b79f32f5d59d66c' 
  AND token = 'mvpalY9MnqWoDsxg2GAG0sCvFsseN2om1X4aSOyft5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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