Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b462f73d4ba8cee3b718a481855f3935124553386694d117d4a8cb34c0e88f66' 
  AND token = 'QJuupFF7w/jLniJOhDcFd97cKt3aillCW46DWNx0zUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}