Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94e0c3e517659e296404991e232f0ff019c1fe495160c6e3325e2fb033fd23e1' 
  AND token = '36LoVzC0rWDRVnlvmcITcIpMbLUBOp/ZJKqKPwzQ7fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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