Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2a7d4a4323ba764254e62c12f6b7511447f79dcf60646b7b127d7d9752b349d4' 
  AND token = 'gKS8embzGbKkZg5wyCOE2tOR2AdjafobgLZi8a9yMr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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