Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16ff98f2a593204f48260f329144e83ebe6c4e09f666bf7bce8f21bae41449d3' 
  AND token = 'yKjzRKzW8sKiUBgZgY3MQAbiPaWvO4TX6Lcki3nUEYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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