Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a5744b3dccbb20435b7f586a84f6dc2f0eecb1005390596d5c3cc84164b0434b' 
  AND token = '/qttDAxLDB9om12jGw8sF7Ws2oazUAQntb1syVcwWj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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