Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '682362d10db23f9e4a60eaf470db935787bc60573e33571504bb5e37a59bf6b9' 
  AND token = '7DUqUz105wQpbKrSblNWG5MVL8oxtqf8STI0C0z1o0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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