Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaca52293b81ff4f903563f6ec9a17ba859057a6a4e7b23b9ed665810f404bc6' 
  AND token = 'OFIqhexbc50c7HN3tw3NEBpRl0cLg1NK3aiS+TSNmSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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